I have crossed the Atlantic three times, and honestly, it will probably be foggy and gray for at least the last few days approaching Europe. There is a good chance the seas will get rough as well. It just depends on "the weather". I would definitely take some Bonine along.
Not trying to scare you, I think it is a 50-50 chance of good or bad weather. I'm just saying "be prepared."
I am the editor, but I also speculate, ask questions and play devil's advocate. I reserve the right to change my mind.